Was Duran a greater lightweight than Leonard was a welterweight? No not to me. Duran, Benitez, and Hearns trump what Duran did at lightweight.

Was Duran's victory over Leonard greater than Leonard's over Hagler? Yes it was. Leonard was the favorite to win and Duran climbing up two weight classes and beating him trumps beating a old Hagler (Who I don't even think he beat).

Does Duran compare to Leonard resume wise across a whole career?
Yes he does. Duran may not have the better top wins but I think his overall resume is better than Leonard's.

Does Duran compare to Leonard skillwise in a peak for peak comparison? Hell yes. I don't think Duran is more skilled but he is up there. I rate Leonard higher than most when it comes to skill.

Does Duran's weight hopping compare to Leonard's? No, Duran's climbing up in weight was on a different level. To start from 118 pounds all the way up to light heavyweight is amazing. Leonard ****ed up for me with Lalonde.

to me Ray's welterweight reign is much greater than Duran's lightweight reign.

I think Ray's win over Hagler who was champion for 7 years and 11 or so title defenses is better than Duran's over Ray who was on the second defense of his first title

I say when a guy wins a title that is where his weight started. A guy starts in 1967 when he is 15 years old does not really mean that much as far as gaining weight and getting bigger. What hurts Duran's legacy for me is not enough wins against elites. It is a big flaw in his record. People say he is top 10 ever, but I cannot see that with his wins against elites. one win against an elite before Ray was really elite. And that statement bothers people, but the fact Ray lost was Ray as the variable not Duran.